Double seat regulating valve Double seat regulating valve

Double seat regulating valve

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Double seat regulating valve

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Double-seat regulating valve is a regulating valve with an up and down guiding structure. It adopts a fluid pressure balance spool. Because it has a structure that balances the fluid pressure acting on the spool, it only needs a small operating force to achieve stable regulation. It is suitable for For occasions where the leakage requirement is not strict. It can be used to control fluids of various pressures and temperatures, with small pressure drop loss, large flow rate, wide adjustable range, high accuracy of flow characteristic curve and good shock resistance. Widely used in petroleum, chemical industry, metallurgy, power station and other industrial sectors to control the control of gas, liquid, steam and other media.
This series of control valves can be easily made into special structures such as bellows seal type, steam jacket type, and extended upper valve cover.
According to different operating conditions and occasions, the control valve can be equipped with different actuators to meet the requirements of use, fine and small pneumatic film actuators, fine and small single-acting piston cylinders, double-acting cylinders, electric electronic actuators, electric intelligent Type actuators and other actuators to combine, its compact structure, small size, light weight, beautiful appearance.

 

Valve body

Type: Straight-through double-seat ball valve

Nominal diameter: 25 ~ 300mm

Nominal pressure: ANSI150 300 600, HE 10 20 30 40K, PN1.6 4.0 6.4 10.0 MPa

Connection form: Flange RF RTJ MFM, Connection standard ANSI B16.5 JIS B2201, JB79.1 JB79.2

Material: SCPH2/WCB/ A105 SCPL1/LCB, SCPH21/WC6/ A182-F11, SCPH32/WC9/ A182-F22, SCS13A/CF8/ SUSF304, SCS14A /CF8M/SUSF316

Upper valve cover: Normal temperature type: -17～+230℃, Heat dissipation type: -45～-17℃ +230～+566℃, Extended type: -196～- 45℃

Bellows type features: The bellows sealing structure can completely eliminate the possibility of process medium leaking from the valve stem movement gap. Due to the deformability and outstanding aging resistance of the bellows element itself, this structure completely overcomes the weaknesses of packing aging and temperature difference sensitivity that usually exist in packing seals. The use of bellows is a double-sealed structure with better safety and reliability. It is widely used in automatic control systems for rare and special media such as highly toxic, highly corrosive, and radioactive.

Remarks: But pay attention to the operating temperature and pressure range of various materials.

Gland form: Bolt compression type

Packing: V-type PTFE, PTFE carbon fiber, PTFE asbestos and flexible graphite

Valve inner components: double-seat plunger-type spool

Flow characteristics: equal percentage linear 

Material: 1Cr18Ni9 SUS316 17-4PH heat treatment, Partial hardfacing Stellite Full hardfacing Stellite

Accessories: electrical positioner, filter pressure reducing valve, solenoid valve, limit switch, governor, lock valve, manual operating mechanism

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